The model stands 4 mm tall, with each colour set at a height of 1 mm.
If your 3D printer prints in a single colour, pause at 1mm,2mm, and 3mm to change colours before continuing.

The colour I used for the mode is black > orange > green > white (bottom to top).

Also, the scale of the model you see in the photo is scaled to 75 x 75 x 4mm.